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linux-stable/drivers/spi
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Janek Kotas e7b6b3699b spi: cadence: Change usleep_range() to udelay(), for atomic context 
commit 931c4e9a72 upstream.

The path "spi: cadence: Add usleep_range() for
cdns_spi_fill_tx_fifo()" added a usleep_range() function call,
which cannot be used in atomic context.
However the cdns_spi_fill_tx_fifo() function can be called during
an interrupt which may result in a kernel panic:

BUG: scheduling while atomic: grep/561/0x00010002
Modules linked in:
Preemption disabled at:
[<ffffff800858ea28>] wait_for_common+0x48/0x178
CPU: 0 PID: 561 Comm: grep Not tainted 4.17.0 #1
Hardware name: Cadence CSP (DT)
Call trace:
 dump_backtrace+0x0/0x198
 show_stack+0x14/0x20
 dump_stack+0x8c/0xac
 __schedule_bug+0x6c/0xb8
 __schedule+0x570/0x5d8
 schedule+0x34/0x98
 schedule_hrtimeout_range_clock+0x98/0x110
 schedule_hrtimeout_range+0x10/0x18
 usleep_range+0x64/0x98
 cdns_spi_fill_tx_fifo+0x70/0xb0
 cdns_spi_irq+0xd0/0xe0
 __handle_irq_event_percpu+0x9c/0x128
 handle_irq_event_percpu+0x34/0x88
 handle_irq_event+0x48/0x78
 handle_fasteoi_irq+0xbc/0x1b0
 generic_handle_irq+0x24/0x38
 __handle_domain_irq+0x84/0xf8
 gic_handle_irq+0xc4/0x180

This patch replaces the function call with udelay() which can be
used in an atomic context, like an interrupt.

Signed-off-by: Jan Kotas <jank@cadence.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-09 19:55:53 +02:00
..
Kconfig Merge remote-tracking branches 'spi/topic/pxa', 'spi/topic/pxa2xx', 'spi/topic/qup', 'spi/topic/rockchip' and 'spi/topic/sh' into spi-next 2017-09-04 15:51:26 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spi-adi-v3.c
spi-altera.c spi: altera: Consolidate TX/RX data register access 2017-08-16 11:53:31 +01:00
spi-armada-3700.c spi: a3700: Clear DATA_OUT when performing a read 2018-04-26 11:02:07 +02:00
spi-ath79.c spi/ath79: Fix checkpatch warnings 2017-07-17 12:09:38 +01:00
spi-atmel.c spi: atmel: init FIFOs before spi enable 2018-04-24 09:36:24 +02:00
spi-au1550.c
spi-axi-spi-engine.c spi: spi-axi: fix potential use-after-free after deregistration 2017-12-10 13:40:39 +01:00
spi-bcm-qspi.c spi: bcm-qspi: fIX some error handling paths 2018-05-30 07:52:32 +02:00
spi-bcm-qspi.h spi: iproc-qspi: Add Broadcom iProc SoCs support 2016-09-24 20:03:25 +01:00
spi-bcm53xx.c spi: bcm53xx: (re)license code to the GPL v2 2017-01-06 18:21:50 +00:00
spi-bcm53xx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spi-bcm63xx-hsspi.c Merge remote-tracking branches 'spi/topic/altera', 'spi/topic/at79', 'spi/topic/bcm-qspi', 'spi/topic/bcm63xx' and 'spi/topic/bcm63xx-hspi' into spi-next 2017-09-04 15:51:14 +01:00
spi-bcm63xx.c spi/bcm63xx: fix error return code in bcm63xx_spi_probe() 2017-08-08 11:36:35 +01:00
spi-bcm2835.c
spi-bcm2835aux.c spi: bcm2835aux: ensure interrupts are enabled for shared handler 2018-06-21 04:02:54 +09:00
spi-bfin-sport.c
spi-bfin5xx.c
spi-bitbang-txrx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spi-bitbang.c
spi-brcmstb-qspi.c spi: brcmstb-qspi: Broadcom settop platform driver 2016-09-14 18:03:32 +01:00
spi-butterfly.c
spi-cadence.c spi: cadence: Change usleep_range() to udelay(), for atomic context 2018-09-09 19:55:53 +02:00
spi-cavium-octeon.c spi: octeon: Split driver into Octeon specific and common parts 2016-07-24 21:54:29 +01:00
spi-cavium-thunderx.c spi: spi-cavium-thunderx: Add missing clk_disable_unprepare() 2016-08-24 12:37:43 +01:00
spi-cavium.c spi: octeon: Split driver into Octeon specific and common parts 2016-07-24 21:54:29 +01:00
spi-cavium.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spi-clps711x.c spi: clps711x: Driver refactor 2016-07-07 11:44:43 +02:00
spi-coldfire-qspi.c
spi-davinci.c spi: davinci: fix a NULL pointer dereference 2018-09-09 19:55:52 +02:00
spi-dln2.c
spi-dw-mid.c spi: dw-mid: switch to new dmaengine_terminate_* API (part 2) 2017-01-04 12:27:00 +00:00
spi-dw-mmio.c spi: dw: Disable clock after unregistering the host 2017-04-18 19:16:49 +01:00
spi-dw-pci.c
spi-dw.c spi: dw: Make debugfs use bus num and make irq name unique 2017-01-09 11:22:14 +00:00
spi-dw.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spi-efm32.c
spi-ep93xx.c spi: spi-ep93xx: use the default master transfer queueing mechanism 2017-08-09 17:53:14 +01:00
spi-falcon.c spi: spi-falcon: drop check of boot select 2017-09-01 11:33:22 +01:00
spi-fsl-cpm.c
spi-fsl-cpm.h
spi-fsl-dspi.c spi: spi-fsl-dspi: Fix imprecise abort on VF500 during probe 2018-09-09 19:55:53 +02:00
spi-fsl-espi.c spi: fsl-espi: fix ioread16/iowrite16 endianness 2016-12-01 18:50:59 +00:00
spi-fsl-lib.c
spi-fsl-lib.h spi: fsl-espi: separate fsl-espi from fsl-lib completely 2016-11-14 11:21:48 +00:00
spi-fsl-lpspi.c spi: fsl-lpspi: fix indentation error 2017-01-09 19:34:02 +00:00
spi-fsl-spi.c Merge remote-tracking branches 'spi/topic/devprop', 'spi/topic/fsl', 'spi/topic/fsl-dspi', 'spi/topic/imx' and 'spi/topic/lantiq' into spi-next 2017-04-26 15:58:04 +01:00
spi-fsl-spi.h
spi-gpio.c
spi-img-spfi.c spi: img-spfi: Remove spi_master_put in img_spfi_remove() 2016-07-27 19:00:16 +01:00
spi-imx.c spi: imx: do not access registers while clocks disabled 2018-02-03 17:39:23 +01:00
spi-iproc-qspi.c spi: iproc-qspi: Add Broadcom iProc SoCs support 2016-09-24 20:03:25 +01:00
spi-jcore.c spi: jcore: Fix module autoload for OF registration 2016-11-23 16:42:20 +00:00
spi-lantiq-ssc.c Merge remote-tracking branches 'spi/topic/devprop', 'spi/topic/fsl', 'spi/topic/fsl-dspi', 'spi/topic/imx' and 'spi/topic/lantiq' into spi-next 2017-04-26 15:58:04 +01:00
spi-lm70llp.c
spi-loopback-test.c spi: loopback-test: implement testing with no CS 2017-07-26 13:08:56 +01:00
spi-lp8841-rtc.c
spi-meson-spicc.c spi: meson-spicc: Fix error handling in meson_spicc_probe() 2018-08-03 07:50:38 +02:00
spi-meson-spifc.c spi: meson: Add GXBB compatible 2016-09-12 20:11:39 +01:00
spi-mpc52xx-psc.c
spi-mpc52xx.c spi/mpc52xx: Combine substrings for two messages 2017-01-17 18:28:19 +00:00
spi-mpc512x-psc.c
spi-mt65xx.c spi: mediatek: add spi support for mt2712 IC 2017-06-20 13:39:14 +01:00
spi-mxs.c
spi-nuc900.c
spi-oc-tiny.c
spi-omap-100k.c
spi-omap-uwire.c
spi-omap2-mcspi.c spi: omap: Allocate bus number from spi framework 2017-08-18 12:15:41 +01:00
spi-orion.c spi: Convert to using %pOF instead of full_name 2017-07-19 11:56:23 +01:00
spi-pic32-sqi.c spi: pic32-sqi: use list_move_tail and list_move 2016-08-08 11:56:40 +01:00
spi-pic32.c spi: pic32: fix spelling mistakes on macro names 2017-07-26 13:04:21 +01:00
spi-pl022.c spi: pl022: constify amba_id 2017-08-23 17:12:05 +01:00
spi-ppc4xx.c spi/ppc4xx: Use kcalloc() in spi_ppc4xx_of_probe() 2017-01-17 18:34:25 +00:00
spi-pxa2xx-dma.c spi: pxa2xx: Remove pointer to chip data from driver data 2016-09-12 20:01:27 +01:00
spi-pxa2xx-pci.c spi: pca2xx-pci: Allow MSI 2017-01-23 18:09:37 +00:00
spi-pxa2xx.c spi: pxa2xx: Add support for Intel Ice Lake 2018-09-09 19:55:52 +02:00
spi-pxa2xx.h spi: pxa2xx: Allow 64-bit DMA 2018-05-22 18:53:56 +02:00
spi-qup.c spi: qup: fix 64-bit build warning 2017-08-10 15:50:23 +01:00
spi-rb4xx.c
spi-rockchip.c spi: rockchip: configure CTRLR1 according to size and data frame 2017-08-16 11:58:23 +01:00
spi-rspi.c Merge remote-tracking branches 'spi/topic/rockchip', 'spi/topic/rspi', 'spi/topic/s3c64xx', 'spi/topic/sh-msiof' and 'spi/topic/slave' into spi-next 2017-02-19 16:41:05 +00:00
spi-s3c24xx-fiq.h
spi-s3c24xx-fiq.S
spi-s3c24xx.c
spi-s3c64xx.c spi: spi-s3c64xx: Fix system resume support 2018-08-03 07:50:20 +02:00
spi-sc18is602.c spi: sc18is602: Add OF device ID table 2017-02-22 10:50:09 -08:00
spi-sh-hspi.c
spi-sh-msiof.c spi: sh-msiof: Fix setting SIRMDR1.SYNCAC to match SITMDR1.SYNCAC 2018-08-03 07:50:31 +02:00
spi-sh-sci.c
spi-sh.c spi: spi-sh: fix error return code in spi_sh_probe() 2017-08-09 17:18:06 +01:00
spi-sirf.c spi: sirf: fix spelling mistake: "registerred" -> "registered" 2017-06-28 20:02:52 +01:00
spi-slave-system-control.c spi: slave: Add SPI slave handler controlling system state 2017-05-26 13:12:19 +01:00
spi-slave-time.c spi: slave: Add SPI slave handler reporting uptime at previous message 2017-05-26 13:12:04 +01:00
spi-st-ssc4.c spi: st-ssc4: whitespace cleanup 2017-05-26 12:41:07 +01:00
spi-stm32.c spi: stm32: Fix logical error in stm32_spi_prepare_mbr() 2017-09-13 09:42:27 -07:00
spi-sun4i.c spi: sun4i: disable clocks in the remove function 2018-02-25 11:08:02 +01:00
spi-sun6i.c spi: sun6i: disable/unprepare clocks on remove 2018-03-19 08:42:53 +01:00
spi-tegra20-sflash.c spi: tegra20-sflash: explicitly request exclusive reset control 2017-07-19 17:06:31 +01:00
spi-tegra20-slink.c spi: tegra20-slink: explicitly request exclusive reset control 2017-07-19 17:06:26 +01:00
spi-tegra114.c spi: tegra114: explicitly request exclusive reset control 2017-07-19 17:06:28 +01:00
spi-test.h spi: loopback-test: add elapsed time check 2017-03-17 21:54:08 +00:00
spi-ti-qspi.c Merge remote-tracking branches 'spi/topic/ti-qspi' and 'spi/topic/xlp' into spi-next 2017-04-26 15:58:22 +01:00
spi-tle62x0.c
spi-topcliff-pch.c spi/topcliff-pch: Delete an error message for a failed memory allocation in pch_spi_set_tx() 2017-01-17 18:38:02 +00:00
spi-txx9.c spi: spi-txx9: Add missing clock (un)prepare calls for CCF 2016-08-18 19:10:39 +01:00
spi-xcomm.c
spi-xilinx.c spi: xilinx: Detect stall with Unknown commands 2017-12-29 17:53:47 +01:00
spi-xlp.c spi: xlp: fix error return code in xlp_spi_probe() 2017-08-08 11:36:07 +01:00
spi-xtensa-xtfpga.c
spi-zynqmp-gqspi.c
spi.c spi: Add missing pm_runtime_put_noidle() after failed get 2018-08-03 07:50:31 +02:00
spidev.c Merge branch 'for-spi' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-07-08 10:41:53 -07:00